Truck-frame.



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TRUCK FRAME.

APPLICATION FILED NOV. 20, 1907.'

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1510.381321. PATBNTED MAR, 1o,` 190,8.

J. M. ROH'LFING..

TRUCK FRAME.

APPLICATION FILED NOY. 20, 1907.

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JOHN M. ROHLFING, OF ST. LOUIS, MISSOURI.

TRUCK-FRAME.

gpm. 881,721.

Specification of Letters Patent.

Patented March 10, 1908.

Application filed Navember 2o, i907. serial No. 402,956.

To all whom it 'may concern:

Be it known that I, JOHN M. ROHLFING, a citizen of the United States,residing in the city of St. Louis and State of Missouri, have inventedcertain new and useful Improvements in Truck-Frames, of which thefollowing is a specification. j

The object of my invention is to provide an improved car truck thatshall facilitate the assembling of the bolster and the side frames tooperative relation.

It is also my object to provide improved extensions on the side framesto be connected to the journal boxes and to provide an improvedconstruction for the tie-bars that connect the two side frames.

All these objects and others will be apparent from the followingspecification and claims.

Referring to the drawing-Figure 1 is a plan view of one side of myimproved truck frame. Fig. 2 is a side yelevation thereof. Fig. 3 is asection taken on the line 3 in Fig. 2, showing the end `of the bolsterin dotted lines. Figs. 4 and v5 are sections taken on the line 4 in Fig.2, showing the relation of the end of the bolster to the side frame.Fig. 6 is a section on the line 6 in Fig. 2. Fig. 7 is a section on theline 7 in Fig. 2. Figs. 8, 11, 15 and 18 are side elevationsillustrating modifications. Figs. 9, 10,12, 13, 14, 16, 17, 19, 2O and21 are sections taken on the correspondingly numbered lines in Figs. 8,11,

. 15 and 18.

The side frame of my improved car truck is a single casting having thetop arch bar 15 with a channel section and the bottom arch bar 1.6 withan L section. At each end two flanges 17 project out from the frame andare connected by a horizontal web 18, thus forming an extension of theside frame which is adapted to be bolted by means of the boltholes 1 9to the journal boX. I

The column guides on each side of the opening which receives the end ofthe bolster have flat guiding faces 20 at their upper parts, as shown inFig. 3, where the column guides are illustrated as each having a channelsection. Lower down each column guide has an L section, as shown inFigs. 4 and 5. The flange 21 of one column guide at its lower part isdirected toward the bolster -opening and is near the end of the bolster,while the flange 22 thereof is parallel to the guiding face 20, but setback therefrom. On

slipped off from the bolster.

the other hand one flange 23 of the other co1- umn guide at its lowerpart is directed toward the bolster opening away from the end thereofwhile the other flange 24 is-parallel to the guiding face 20 but setback therefrom. The reference numeral v25 indicates the bolster springseat at the bottom of the bolster opening. From the front and rear edgesof this bolster spring seat 25 bracing flanges 26 depend. The tie-barsthat eX- tend across` from one side frame to the other are indicated bythe reference numeral 2 7. These tie-bars have a Z section, one flange28 resting against the column guides and the other flange 29 beingnotched so that the notch can drop over the lower arch bar 16. Theflange on each side of the notch can be riveted to the flanges 26 whichdepend from the bolster spring seat 25. The web of the Z bar 27 rests onthe bottom of the bolster opening on either side of the bolster springseat 25.

Referring to Figs. 3, 4 and 5, the bolster is represented by thereferencenumeral 28a. This has shoulders 29a and 30 on each side adaptedto engage the uide'faces 20 of the two column guides. hen it is desiredto disconnect the side frame and the bolster this may be done by raisinthe side frame relatively to the bolster, untll the bolster lies in thelower part of the bolster opening in the side frame. Then .the sideframe may be turned from the position shown in full lines in Fig. 4 tothat shown in dotted lines. The diagonal width between the two inturnedflanges 21 and 23 is made greater than the width of the bolster end overthe shoulders 80. Therefore, the side frame may be shifted from theposition shown in full lines in Fig. 5 to that shown in dotted lines,andthen When it is desired to reassemble the parts, these movements canbe reversed, as is obvious.

Itis not necessary that the parts of the column guides which normallyact as guides shall have channel sections, nor is it necessary that theend of the bolster should be entered. and withdrawn at thev lowest partof the bolster opening. Figs. 8 to 21 show modifications that departfrom these conditions. In Fig. 8 the bolster opening is adapted toreceive the end of the bolster at its kstrength in the column guides.

companying each of these figures show the structure without anynecessity for further explanation.

It will be seen that I have provided a side frame with an opening forthe end of the bolster, which at no part of its height permits anyhorizontal displacement of the bolster with relation thereto, withoutrotation thereof. However, by rotation about a vertical axis, the sideframe may be assembled to the bolster or disconnected therefrom. This ismade possible without any sacriiice of The Z tiebars give great strength1n proportion to the amount of material employed and the extensions atthe ends of each side frame, with their double bracing flanges 17,afford a very secure construction.

I claim:

1. In a car truck side frame, two column guides each having a flat guideface extending part of its height, the remainder of each column guidehaving an L-section, the said L-sections of the two column guides beingreversely positioned.

2. In a car truck, a side frame having a bolster opening therein atransverse Z-tiebar having its web adjacent the bottom of the bolsteropening one flange adjacent the side thereof and the other beingnotched, the portions on each side of the notch extending on either sideof the bottom of the bolster opening.

3. In a car truck side frame, two column guides each having a 'flatguide face at its upper part and an L-section at its lower part the twoL-sections being reversely positioned with a iange of each directedtoward the bolster opening,

4. In combination a bolster, and a ear truck side frame having anopening of uniform width adapted to receive the end of' the bolster, thewalls of the bolster opening being so shaped over part of their heightas to prevent rotation of the side frame relatively to the bolster, andthe said walls being so shaped over another part of' their height as topermit such rotation.

5. In combination, a bolster and a car truck side frame having anopening adapted at all heights thereof to prevent lateral displacementof the frame relatively to the bolster and to permit relativo rotationon a vortical axis.

6. In a car truck side frame, two column guides, each having anL-section, the said L- sections of the two column guides being reverselypositioned.

7 A car truck side frame having an opening to receive the end of thebolster, the walls of said opening being so shaped as to provent theapplication ol the side frame to the bolster, except by rotation of theside frame on a vertical axis.

JOHN .\I. HOHLFING.

Titiiesses HERBERT W. VVOLFF, G. P. RUNDLE.

